Patent US3894894A successfully refreshed from Google Patents.
US3894894A
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Modified double base propellants with diisocyanate crosslinker
Assignee: United States Department of the Navy
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Filing: 1962-06-08
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Granted: 1975-07-15
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Expires: 1982-06-08
Abstract
Abstract 1. A propellant composition consisting of at least one of a member of nitrocelluloses selected from a group consisting of densified nitrocellulose, fluid ball powder nitrocellulose and plastisol nitrocellulose, at least one of a member of solid oxidizers selected from a group consisting of ammonium perchlorate, cyclotetramethylene tetranitramine, cyclotrimethylene trinitramine and nitroguanide, at least one of a member of explosive plasticizers selected from a group consisting of nitroglycerin, diethylene glycol dinitrate, triethylene glycol dinitrate and metriol trinitrate, at least one of a member of non-explosive plasticizers selected from a group consisting of triacetin, diallyl phthalate, di-n-propyl adipate, dimethyl sebacate, adiponitrile, isophorone (3,5,5-trimethyl-2cyclohexen-1-one), o-chloronitrobenzene and dinitrotoluene, a stabilizer selected from a group consisting of 2nitrodiphenylamine resorcinol diacetate and symmetrical diethyldiphenylurea, a crosslinking agent selected from a group consisting of 2,4-tolylene diisocyanate, hexamethylene diisocyanate, bitolylene diisocyanate, polyaryl polyisocyanate, 2,6-diisocyanate and 3,3''-dimethyl diphenylmethane 4,4''diisocyanate, and a crosslinking catalyst selected from a group consisting of ferric acelylacetonate, lead 2-ethylhexoate, and di-n-butyl tin diacetate.
Inventors
- 👤 Donald E Elrick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:21
CPC Classifications
C; C06; C06B; C06B23/00; C06B23/001; C06B21/00; C06B21/0033; C06B21/0058; C06B25/00; C06B25/18; C06B25/24; C06B25/26; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/64; C08G18/6484
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
158 words
A PROPELLANT COMPOSITION CONSISTING OF AT LEAST ONE OF A MEMBER OF NITROCELLULOSES SELECTED FROM A GROUP CONSISTING OF DENSIFIED NITROCELLULOSE, FLUID BALL POWDER NITROCELLULOSE AND PLASTISOL NITROCELLULOSE, AT LEAST ONE OF A MEMBER OF SOLID OXIDIZERS SELECTED FROM A GROUP CONSISTING OF AMMONIUM PERCHLORATE, CYCLOTETRAMETHYLENE TETRANITRAMINE, CYCLOTRIMETHYLENE TRINITRAMINE AND NITROGUANIDE, AT LEAST ONE OF A MEMBER OF EXPLOSIVE PLASTICIZERS SELECTED FROM A GROUP CONSISTING OF NITROGLYCERIN, DIETHYLENE GLYCOL DINITRATE, TRIETHYLENE GLYCOL DINITRATE AND METRIOL TRINITRATE, AT LEAST ONE OF A MEMBER OF NON-EXPLOSIVE PLASTICIZERS SELECTED FROM A GROUP CONSISTING OF TRIACETIN, DIALLYL PHTHALATE, DI-N-PROPYL ADIPATE, DIMETHYL SEBACATE, ADIPONITRILE, ISOPHORONE (3,5,5-TRIMETHYL-2-CYCLOHEXEN1-ONE), O-CHLORONITROBENZENE AND DINITROTOLUENE A STABILIZER SELECTED FROM A GROUP CONSISTING OF 2-NITRODIPHENYLAMINE RESORCINOL DIACETATE AND SYMMETRICAL DIETHYLDIPHENYLUREA, A CROSSLINKING AGENT SELECTED FROM A GROUP CONSISTING OF 2,4TOLYLENE DIISOCYANATE, HEXAMETHYLENE DIISOCYANATE, BITOLYLENE DIISOCYANATE, POLYARYL POLYISOCYANATE, 2,6-DIISOCYANATE AND 3,3''-DIMETHYL DIPHENYLMETHANE 4,4''-DIISOCYANATE, AND A CROSSLINKING CATALYST SELECTED FROM A GROUP CONSISTING OF FERRIC ACELYLACETONATE, LEAD 2-ETHYLHEXOATE, AND DI-N-BUTYL TIN DIACETATE.
Claim 2
Dependent Claim
158 words
A PROPELLANT COMPOSITION CONSISTING OF AT LEAST ONE OF A MEMBER OF NITROCELLULOSES SELECTED FROM A GROUP CONSISTING OF DENSIFIED NITROCELLULOSE, FLUID BALL POWDER NITROCELLULOSE AND PLASTISOL NITROCELLULOSE, AT LEAST ONE OF A MEMBER OF SOLID OXIDIZERS SELECTED FROM A GROUP CONSISTING OF AMMONIUM PERCHLORATE, CYCLOTETRAMETHYLENE TETRANITRAMINE, CYCLOTRIMETHYLENE TRINITRAMINE AND NITROGUANIDE, AT LEAST ONE OF A MEMBER OF EXPLOSIVE PLASTICIZERS SELECTED FROM A GROUP CONSISTING OF NITROGLYCERIN, DIETHYLENE GLYCOL DINITRATE, TRIETHYLENE GLYCOL DINITRATE AND METRIOL TRINITRATE, AT LEAST ONE OF A MEMBER OF NON-EXPLOSIVE PLASTICIZERS SELECTED FROM A GROUP CONSISTING OF TRIACETIN, DIALLYL PHTHALATE, DI-N-PROPYL ADIPATE, DIMETHYL SEBACATE, ADIPONITRILE, ISOPHORONE (3,5,5-TRIMETHYL-2-CYCLOHEXEN1-ONE), O-CHLORONITROBENZENE AND DINITROTOLUENE A STABILIZER SELECTED FROM A GROUP CONSISTING OF 2-NITRODIPHENYLAMINE RESORCINOL DIACETATE AND SYMMETRICAL DIETHYLDIPHENYLUREA, A CROSSLINKING AGENT SELECTED FROM A GROUP CONSISTING OF 2,4TOLYLENE DIISOCYANATE, HEXAMETHYLENE DIISOCYANATE, BITOLYLENE DIISOCYANATE, POLYARYL POLYISOCYANATE, 2,6-DIISOCYANATE AND 3,3''-DIMETHYL DIPHENYLMETHANE 4,4''-DIISOCYANATE, AND A CROSSLINKING CATALYST SELECTED FROM A GROUP CONSISTING OF FERRIC ACELYLACETONATE, LEAD 2-ETHYLHEXOATE, AND DI-N-BUTYL TIN DIACETATE.
Claim 3
Independent Claim
74 words
A method for the preparation of a modified double base propellant grain comprising the steps of (1) adding while stirring at about 2 mm pressure nitrocellulose, ammonium perchlorate and aluminum to a solution composed of nitroglycerin, di-n-propyl adipate, 2-nitrophenylamine, resorcinol diacetate, 2, 4-tolylene diisocyanate and ferric acetylacetonate, (2) transferring the resulting mixture under lower pressure to a container, and (3) curing for about seven days at a temperature ranging between 100* to 120* C.
Claim 4
Independent Claim
74 words
A method for the preparation of a modified double base propellant grain comprising the steps of (1) adding while stirring at about 2 mm pressure nitrocellulose, ammonium perchlorate and aluminum to a solution composed of nitroglycerin, di-n-propyl adipate, 2-nitrophenylamine, resorcinol diacetate, 2, 4-tolylene diisocyanate and ferric acetylacetonate, (2) transferring the resulting mixture under lower pressure to a container, and (3) curing for about seven days at a temperature ranging between 100* to 120* C.
Claim 5
Independent Claim
133 words
A method for the preparation of modified double base propellants comprising the steps of (1) stirring 100 parts of the following mixture consisting of (a) 11 parts by weight nitrocellulose, (b) 22 parts by weight ammonium perchlorate, (c) 20 parts by weight aluminum, (d) 34.79 parts by weight nitroglycerin, (e) 11.13 parts by weight triacetin, (f) 1.03 parts by weight 2-nitrodiphenylamine and (g) 0.07 parts by weight lead 2-ethylhexoate, with 58 parts methylene chloride until the solids are well dispersed, (2) removing all but about 10% of the methylene chloride by heating to a temperature of about 40* -45* C., (3) adding 0.3 parts by weight 2,4-tolylene diisocyanate, (4) transferring the mixture under pressure of about 15 psi. to a curing container and (5) curing for about 16 hours at about 50* C.
Claim 6
Independent Claim
133 words
A method for the preparation of modified double base propellants comprising the steps of (1) stirring 100 parts of the following mixture consisting of (a) 11 parts by weight nitrocellulose, (b) 22 parts by weight ammonium perchlorate, (c) 20 parts by weight aluminum, (d) 34.79 parts by weight nitroglycerin, (e) 11.13 parts by weight triacetin, (f) 1.03 parts by weight 2-nitrodiphenylamine and (g) 0.07 parts by weight lead 2-ethylhexoate, with 58 parts methylene chloride until the solids are well dispersed, (2) removing all but about 10% of the methylene chloride by heating to a temperature of about 40* -45* C., (3) adding 0.3 parts by weight 2,4-tolylene diisocyanate, (4) transferring the mixture under pressure of about 15 psi. to a curing container and (5) curing for about 16 hours at about 50* C.
Claim 7
Dependent Claim
83 words
A propellant composition consisting of a binder composed of nitrocellulose, an oxidizer selected from the group consisting of ammonium perchlorate, nitroguanidine, cyclotetramethylene tetranitramine, and cyclotrimethylene tetranitramine, a solvent composed of a mixture selected from the group consisting of nitroglycerin, triacetin, nitrodiphenylamine, triethylene glycol dinitrate and diethylene glycol dinitrate, aluminum metal powder, a catalyst selected from the group consisting of lead-2-ethylhexoate and ferric acetylacetonate, and a crosslinking agent selected from the class of diisocyanates consisting of 2,4-tolylene diisocyanate, 3,3''-diisocyanate, hexamethylene diisocyanate and bitolylene diisocyanate.
Claim 8
Dependent Claim
83 words
A propellant composition consisting of a binder composed of nitrocellulose, an oxidizer selected from the group consisting of ammonium perchlorate, nitroguanidine, cyclotetramethylene tetranitramine, and cyclotrimethylene tetranitramine, a solvent composed of a mixture selected from the group consisting of nitroglycerin, triacetin, nitrodiphenylamine, triethylene glycol dinitrate and diethylene glycol dinitrate, aluminum metal powder, a catalyst selected from the group consisting of lead-2-ethylhexoate and ferric acetylacetonate, and a crosslinking agent selected from the class of diisocyanates consisting of 2,4-tolylene diisocyanate, 3,3''-diisocyanate, hexamethylene diisocyanate and bitolylene diisocyanate.
Claim 9
Dependent Claim
21 words
A propellant composition consisting essentially of nitrocellulose, ammonium perchlorate, aluminum, nitroglycerin, di-n-propyl adipate, 2-nitrodiphenylamine, resorcinol diacetate, 2,4-tolylene diisocyanate and ferric acetylacetonate.
Claim 10
Dependent Claim
21 words
A propellant composition consisting essentially of nitrocellulose, ammonium perchlorate, aluminum, nitroglycerin, di-n-propyl adipate, 2-nitrodiphenylamine, resorcinol diacetate, 2,4-tolylene diisocyanate and ferric acetylacetonate.
Claim 11
Dependent Claim
48 words
A propellant composition consisting essentially of from 10 to 20% nitrocellulose, about 20% ammonium perchlorate, about 20% aluminum, 28.4 to 36.2% nitroglycerin, 9 to 11.5% di-n-propyl adipate, 1% resorcinol diacetate, 1% 2-nitrodiphenylamine, 0.15 to 0.50% 2,4-tolylene diisocyanate and 0.007 to 0.05% ferric acetylacetonate; all percentages being by weight.
Claim 12
Dependent Claim
48 words
A propellant composition consisting essentially of from 10 to 20% nitrocellulose, about 20% ammonium perchlorate, about 20% aluminum, 28.4 to 36.2% nitroglycerin, 9 to 11.5% di-n-propyl adipate, 1% resorcinol diacetate, 1% 2-nitrodiphenylamine, 0.15 to 0.50% 2,4-tolylene diisocyanate and 0.007 to 0.05% ferric acetylacetonate; all percentages being by weight.
Claim 13
Dependent Claim
58 words
A propellant composition consisting essentially of 15 to 21.6% nitrocellulose of 70 Mu particle size, 20 to 20.2% ammonium perchlorate, 20 to 20.9% aluminum, 26.3 to 32.4% nitroglycerin, 8.4 to 10.15% triacetin, 1.0% 2-nitrodiphenylamine, 1.0% resorcinol, 0.10% calcium phosphate, 0.38 to 0.40% 2,4-tolylene diisocyanate, 0.01% ferric acetylacetonate and 0.03 to 0.04% dioctyl phthalate; all percentages being by weight.
Claim 14
Dependent Claim
58 words
A propellant composition consisting essentially of 15 to 21.6% nitrocellulose of 70 Mu particle size, 20 to 20.2% ammonium perchlorate, 20 to 20.9% aluminum, 26.3 to 32.4% nitroglycerin, 8.4 to 10.15% triacetin, 1.0% 2-nitrodiphenylamine, 1.0% resorcinol, 0.10% calcium phosphate, 0.38 to 0.40% 2,4-tolylene diisocyanate, 0.01% ferric acetylacetonate and 0.03 to 0.04% dioctyl phthalate; all percentages being by weight.
Claim 15
Dependent Claim
48 words
A propellant composition consisting essentially of 15% plastisol nitrocellulose, 20% ammonium perchlorate, 20% aluminum, 32.1 to 32.25% nitroglycerin, 10.2 to 10.3% triacetin, 1.2 to 1.55% 2-nitrodiphenylamine, 0.4 to 0.8% symmetrical diethyldiphenylurea, 0.1% calcium phosphate, 0.30 to 0.45% 2,4-tolylene diIsocyanate and 0.01% ferric acetylacetonate; all percentages being be weight.
Claim 16
Dependent Claim
48 words
A propellant composition consisting essentially of 15% plastisol nitrocellulose, 20% ammonium perchlorate, 20% aluminum, 32.1 to 32.25% nitroglycerin, 10.2 to 10.3% triacetin, 1.2 to 1.55% 2-nitrodiphenylamine, 0.4 to 0.8% symmetrical diethyldiphenylurea, 0.1% calcium phosphate, 0.30 to 0.45% 2,4-tolylene diIsocyanate and 0.01% ferric acetylacetonate; all percentages being be weight.
References Cited (Backward Citations)
US2916775A
Cited
US3002830A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-07-14 | 1979-01-13 | 1979-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-14 | 1983-01-13 | 1983-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-14 | 1987-01-13 | 1987-07-15 | $7700.00 | Window Closed / Lapsed |